I have trouble limiting these things, but I'll try...

1) Rokk Krinn (non-powered) / Cosmic Boy
2) The Metal Men
3) Jonah Hex
4) Dr. Mid-Nite
5) Superman...or Batman...or...Wes Dodds or...

Villain:
1) Lex Luthor closely followed by the Time Trapper (esp. the Rokk Krinn variant) who is closely followed by Brainiac who is closely followed by...

Hero:

1) The Spectre (Jim Corrigon)
2) Martian Manhunter
3) Black Adam
4) Impulse
5) Mister Miracle

Villain:

Eclipso (90's uber powerful version)

Heroes

1 Riddler
2 Joker
3 Two-Face
4 Penguin
5 Harley Quinn

Villain

Batman